Hi I am doing a complex search following the example of Ayende's Blog at this address

http://www.ayende.com/Blog/archive/2006/12/07/7055.aspx

Unfurtunately I couldn't find how to sum the multiplication of 2 columns with Criteria.
My HQL (just an abstract) is

select distinct c
from Customer c
where
(
select sum(d1.UnitPrice*d1.Quantity)
from Customer c1
join c1.Orders o1
join o1.Detail d1
where o1.Customer.Id = c.Id
) > 10000

How can I translate the above HQL it to Criteria?

Thank you